[ 1231.386577][T11137] netdevsim netdevsim476 eni476np1: renamed from eth0 [ 1231.392041][T11136] netdevsim netdevsim727 eni727np1: renamed from eth1 [ 1234.680384][T11129] Could not find device with ifindex 2000 in netnsfd 11 [ 1234.681167][T11129] Could not find netns with fd: 2000 [ 1234.681821][T11129] Cannot link a netdevsim to itself [ 1234.682496][T11129] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).